<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<script>
    let d = document.createElement("div");
    d.innerText = "我是div";
    document.body.appendChild(d);
    let h1 = document.createElement("h1");
    let h2 = document.createElement("h2");
    h1.innerText = "这是h1";
    h2.innerText = "这是h2";
    document.body.append(h1,h2);

    //创建图片并添加
    let i = document.createElement("img");
    i.src = "../b.jpg";
    document.body.append(i)
</script>
</body>
</html>